Question 1

How does Whey Protein Isolate taste?

Accepted Answer

WPI is flavoured and is generally considered to have a pleasant taste.

Question 2

What is WPI made from?

Accepted Answer

Whey Protein Isolate is a protein derived from milk.

Question 3

How is Bulk Nutrients' WPI packaged?

Accepted Answer

Bulk Nutrients' Whey Protein Isolate is packaged in resealable 1kg pouches.

Question 4

Can I purchase WPI in smaller sizes?

Accepted Answer

Yes - WPI is also available in single-serve sachets which we call  WPI Sample Packs .

Question 5

Is the packaging for this product recyclable?

Accepted Answer

In theory yes, but not in all council areas right now. The REDcycle program has been discontinued, and the industry is working together to find a solution to continue recycling soft plastics. For now, we recommend checking with your local council, but most require you to put the packaging in your regular landfill bin. The included scoop can be recycled as hard plastic in your local council pickup. For more information about what Bulk is doing to improve sustainability,  check this article .

Question 6

Can I receive a discount buying more than one of this product at once?

Accepted Answer

Absolutely! Price breaks for Whey Protein Isolate begin when you purchase 2 units of any flavour. Just add more than that to your cart to see the savings.

Question 7

Does Bulk do a Natural version of WPI?

Accepted Answer

We sure do! Our  Natural Whey Protein Isolate  is one of the cleanest and most pure whey proteins available on the market. Bulk Nutrients’ Natural WPI comes from grass fed cows and is 100% hormone free so you can be confident in the protein you’re using. Natural WPI also contains virtually no lactose, and is extremely low in both fat and carbs, while maintaining 91% protein per serve. We use natural flavours and stevia to sweeten to ensure our Natural WPI remains all natural.

Question 8

Does Bulk do a WPI safe for use in tested sports?

Accepted Answer

Absolutely! We’re really proud that two flavours of our WPI are regularly HASTA tested, and are  HASTA certified  to support natural athletes and competitors with their training and recovery. Currently we range our  HASTA WPI  in both Vanilla and Chocolate flavours and they’re used by a range of  our ambassadors and sporting teams  we work with.

Question 9

Why is Whey Protein Isolate the best choice?

Accepted Answer

Whey Protein Isolate has the highest biological value of any protein source and WPI is the most processed and purest form of Whey Protein. WPI contains around 1% fats, 1% carbohydrates and around 90% of protein. As it is rapidly absorbed, it is ideal post workout, especially when training in a fasted state.

Question 10

Is Whey Protein Isolate lactose free?

Accepted Answer

Whey Protein Isolate contains small amounts of lactose which usually means it is suitable for lactose sensitive individuals. People with complete lactose malabsorption may still have trouble tolerating the lactose in whey protein isolate. Comparatively though WPI contains very little lactose, at approximately 0.3 grams per serve it has forty times less lactose than a glass of milk.

Question 11

Does Whey Protein Isolate contain gluten?

Accepted Answer

Gluten is not naturally occurring in any of the ingredients in our Whey Protein Isolate, though we do process other gluten containing ingredients in our facility.

Question 12

How many serves of WPI should I have each day?

Accepted Answer

The answer here will depend on your weight, energy levels and goals. Most athletes and active people aim to consume 2 grams of protein per kilogram of bodyweight per day. For an 80kg person, this equals 160 grams of protein. Two WPI shakes a day would contribute 52g of protein to this total, leaving approximately 108 grams of protein to be consumed through general food sources. Protein from protein shakes should be one of multiple protein sources you consume, not the only one.

Question 13

What is the standard dose of WPI powder?

Accepted Answer

30 grams is the generally accepted standard dose of WPI protein powder, as this yields between 25 and 28 grams of pure protein.

Question 14

How long after a workout should I have WPI?

Accepted Answer

For optimal recovery and muscle growth, it’s generally recommended to take Whey Protein Isolate within 20-60 minutes after exercise.

Question 15

Why is WPI better than eating tuna, meat or drinking milk?

Accepted Answer

Like other powdered protein sources, WPI is great value for money and can be very convenient. With a long shelf life (usually up two years), WPI is extremely stable and can be stored, carried and consumed easily unlike a tin of tuna or steak. WPI contains only trace amounts of fats and carbohydrates, as opposed to most high protein foods which contain these in higher amounts.

Question 16

How soon should I drink WPI after mixing it with water?

Accepted Answer

While WPI is very stable in powdered form this changes when mixed with water. Once mixed with water, WPI should be consumed within an hour. It can last more than 24 hours once blended with water if refrigerated.

Nothing in your cart

No recent items

Hey there, Bulk fan!

Whey Protein Isolate

Package Size - 1kg

Price Per Bag

How helpful was this page?

Outdoor Fitness: How Nature Can Boost Your Mind and Body

The Bar Has Been Raised - Big Time!

What to Stack With Creatine for Better Results

Nootropics Frequently Asked Questions

What Does 30 Grams of Protein Look Like?

Running and Strength Training: How to Keep Your Gains

Strawberry Maple Overnight Oats

How to Make Your Own Pre Workout Supplement

Adaptive Metabolism: How to Set the Right Calories

Spinach and Feta Bake

What Makes Bulk Nutrients’ Supplements Aussie As?

Mastering Fitness: Goals, Motivation & Mindset

Heavy Metals in Protein Powder? What You Need to Know

Gut Health and Fitness: Probiotics & Fibre Explained

Grow More Muscle and Decrease Breakdown With Glutamine

Intra Workout - Our Delicious Vegan Protein Drink

Frequently Asked Test Booster Questions

The Longevity Basics Most People Skip

The Best Plant-Based Supplements for Vegans and Vegetarians

Training to Failure: Is It Helping Or Hurting Your Progress?

Lean Bulking: How to Gain Muscle Without the Fat

Injury Prevention: How to Lift Safely in the Gym

A Beginner’s Guide to Calisthenics

Active Recovery: The Best Workouts for Rest Days

The Ultimate Guide to Amino Acids

Overnight Weetbix Recipe

Bulk Nutrients Takes Out BigCommerce Growth Award

All The Answers to Your Fat Burning FAQs!

What is Hydrolysed Collagen?

An Insider’s Guide to Motocross Supplements

Why You Need to Try Protein Balance!

Our Most Frequently Asked Questions About Carbohydrates

How Bulk Supports Grassroot Community Groups Across Australia

A Complete Guide on How to Grow Bigger Forearms

Supplement Timing: Pre, Intra & Post Workout Guide

The Three Principles of Muscle Growth

Can You Take Creatine and Caffeine Together?

Whey Protein vs Plant Protein

Supplement Powder Densities

Whey Protein Isolate vs Concentrate: A Detailed Comparison

Everything You've Wanted to Know About Our Protein! (FAQs)

Gym Gear 101: Belts, Straps & Lifting Accessories

Discovering Collagen Hydrolysate: More Than Just Anti-Ageing

Fitness Myths Busted: What Science Really Says